James hamilton



UNITED sTATEs PATENT oEEicE.

JAMES HAMILTON, OF NEW YORK, N. Y.

MACHNE Fon cUTTIN vENiiEris.-

'Sec'catih of Letters Patent No. 77, dated November 10, 1836.

To aZZ whom t may concern I Be it known that I, JAMES HAMILTON, of thecity, county, and State of New York., have invented and brought intosuccessful operation a new and useful Improvement in the Mode of CuttingVeneers, and that the following is a full and exact description of theconstruction and operation of my machine, reference being had to thedrawings annexed hereto and lmaking part of this specification, wherein-Figure` 1, is an orthographical projection of the front view of saidmachine, Fig 2 is a back view of the center part of the sliding framehereinafter described, Fig. 3 is a described, Fig. 4c is a View of theratchet wheel arbor, and pinion wheel hereinafter described, the samefigures and letters of denoting the same parts in all the separatefigures. Y

A, A, A, A, are four standards or posts connected together at the bottomby five pieces B, B, B, B B, and at t-he top in the same manner by thepieces C, C, C, C. Upon C, C, C, O,'are fitted two horizontal slidewaysA, A, on which the sliding frame F, traverses having fitted on it thesliding gage piece H, moved by the two screws ZJ, b.

D, D, are two vertical standards or fender posts elongated above theslide ways a, a, to receive t-he vertical slideways E, E, attached tothe connecting pieces B, B, are boxes C, C, C, which receive the arbortZ, having on it the live, and dead pulleys e, e, to receive a belt Xfrom some first moving power. On said arbor is the crank I, to which isattached the connect-ing rod or pitman f which communicates areciprocating motion to the sliding frame K, on which are fitted boxes,or bearings g, g, g, g, Fig. 2.' These carry the arbors a, c, of thecircular cutting knives L, L, which are formed of steel, having the faceturned true, and the back edge beveled to allow of strength, and areplaced in an exact line with each other, and near to the adjustingrollers h, h, which are advanced toward or receded from the cutters L,L, by means of adjusting screws. On

one end of the crank arbor (Z are fitted two circular cams Za, la,placed eccentrically, and these communicate motion to the sliding feederbars Z, Z, on the lower ends of which are fitted rollers to preventfriction, and on the upper end of each a jointed pawl m, having a springO, at the back of jmeasure,4 places the log which is regulated by meansof the screws p, p, attached to the sliding feeder bars Z, Z, Y

which strike on the top fr, and these by beingL raised or lowered makethe stroke ofthe feeders longer or shorter as required. Thev ratchetwheel M is attached to an arbor S, working in the vboxes under the slideframe F, and has a pinion wheel t, at the inner end working into a rackattached to and under the sliding frame F. j W, is sliding bar whichthrows the paw-ls out of work when required. view of one of the cuttingknives hereinafter Y, isa fly wheel on one end of the arbor cZ. When itis desiredA to cut veneers, the workman, having adjusted the machine byto be cut on the horizont-al slide bedF, and securing it to the gagepiece `H, by turning the gage screws Z), Z), the face of the log iscompressed between H, and the adjusting rollers Z1., Zz

j and communicating by means of the beltX from any first mover a rapidrotary motion yto the arbor d. The sliding frame K, K,

slides up and down Awith grooves, or guide-s,

yin the standards, or fender posts D, D, in

the mannerof a saw frame, and a saw in a common saw mill. The middlevertical bar only of this sliding frame is seen in Fig. 2, for thepurpose of showing the manner in which it sustains the arbors, orspindles of the circular cutters L, L. This middle bar is shown by adot-ted line in Fig. l, being behind the faces of the cutters as therelshown. Y

Fig. 5 is a horizontal section through the feeder posts, the slideframe, one of the circular cutters, the gage rollers, and guides. D, D,are the fender posts, K, K, K, the vertical bars of the slide frame, andL, the. circular cutter with its bearing and arbor; the circles ZL, ZL,are sections 0f the adjusting rollers, the 'journals of which work insliding bearings attached to the cross timbers, which connect the twofender posts, the distance of these behind the face of the cuttersdetermines the thickness of the veneer, which is capable of adjustmentby screws, in ways familiar to every competent workman. N, is a curvedguide plate between which and the roller ZL, the veneer passes' Fig. (iis an end view of the slidebed and its appendages. a, a, are theslideways, F, the slidebed, H, the gage piece which is forced up againstthe stuff to be cut so as to make it bear against the rollers h, la.Each of the gage screws b, o, has a pulley t', ,'on its end seen in Fig.1, and a band passing around these causes them to operatesimultaneously. The gage screws revolve in standards j, j. The slideframe K, carrying the circular cutters L, L, on it receives areciprocating motion from the crank I, by which a rotary alternatingmotion is given to the cutters when they come in contact with thematerial to be operated upon at the same time that the ratchet wheel M,propelled by the cams 7c, 7c, acting on the feeder bars Z, Z, causes thepinion t, and rack attached to the slide bed F, and log upon it toapproach the circular cutters, and as soon as the end of the log comesin contact with the cutters they, give an alternating rolling cut whichis continued until the veneer is separated from the log, and as itseparates it passes between the adjusting rollers It, 72 and cutters L,L, and by this means veneers of any thickness can be cut without anyloss of wood, as is usual with saws, and the circular edge of the cutteracting on so small a portion of the cut at once cuts the veneer smoothwithout splitting it, and without being affected in any degree by thegrain of the wood. One veneer having been separated, the workmanattending draws the pawl stop fw, and throws the ratchet out of gear,which allows him to draw the sliding bed and log back again to its firstposition to be operated on in a familiar manner to that before describeduntil the whole of the log is cut up, the thickness of the veneer beingregulated by the distance between the line of the rollers lz, it, andthe face of the cutters L, L'.

The frame of the machine must be made Astout and well put together so asnot to spring or shake in any of its parts.

Two cutters are described in the above specifica-tion, but one, or moremay be used advantageously, according to the greater or less surfacerequired tothe diameter of the log for the cutters to traverse. VThesecutters with smooth sharp edges are much superior to the fine circularsaws which have heretofore been used inasmuch as there is a great savingof material and the veneer is smoother and less power is required tooperate the machine. I do not claim as my invention and improvement saidcutter or cutters separately and without their connection in saidmachine or application to the purposes aforesaid nor any other part ofsaid machine separately; but

I do claim as my invention and improvement- 4 The application of saidcircular revolving cutters above substantially described for thepurposes aforesaid, and in combination with the other parts of saidmachine used for the purpose of applying the same in manner aforesaid orin any other manner substantially the same.

JAMES HAMILTON.

Witnesses W. HAMILTON, A. I. HAMILTON.

